Beading-tool for boiler-tubes.



O. C. KROSHAUG.

BEADING TOOL FOR BOILER TUBE S.

APPLICATION FILED NOV. I7, 1916.

INVENTOR ATTORNEY Patented Sept. 10, 1918.

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' oscan e. nnosnsoe, or VOLGA, scorn nsKo'ra.

.. BEADING-TOOL F63 BOILER-TUBES.

Specification of Letters Patent.

Patented Sept. MP, in

application filed November 17, 1916. Serial No. 131,913.

To all whom it may concern:

Be it known that I, Osonn C. Knosim'ge,

a citizen of the United States, residing at.

V lga, in the county of Brookings andState of South Dakota, have invented certain new and useful Improvements in Beading-Tools for Boiler-Tubes, of which the following is specification.

This invention relates to metal working tools, and, the invention has more particu lar reference to an improved beading tool for boiler tubes for forming the usual beading orflanged ends upon boiler flue tubes, whereby, the same will be secured to the flue sheet.

As an object of equal importance, the invention aims to provide a tool which may be ad usted to various sizes of tubes, thus, permitting the device to be used for flanging theends of boiler fine tubes which vary in diameter.

Among other aims and objects of the invention may be recited, the provision of a beading tool for boiler-tubes of the character mentioned, with a view to compactness, and in which the number of parts are few, the construction simple, the cost of production small, of eiliciency and operation high;

Other improvements and novel delails in the construction and arrangement of parts will be appreciated from the-detailed description to follow, which is to be read in connection with the accompanying drawings,

forming; a part hereof, and wherein ll disclose several preferred embodiments of the invention for the purpose of illustration.

In the drawings:

Figure 1 is a perspective of my improved tool,

Fig. 2 is a section thercthrough taken on the line 2? of Fig. l,

Fig. 3 is a similar section showing a slightly modified form of tool,

Fig. 4 is a fragmental vertical section through the preferred embodiment of the tool, and

Fig. 5 is a fragmentary side elevation of the tool, illustrating the same in use upon a tube and sheet, the latter element being shown in section.

Similar characters of reference are employed i isall of the above described views to indicative corresponding parts.

Referring now in detail to the drawings, the present improvements may be said to emvbody a cylindrical mandrel 1, which .has

formed therein, in proximity to one end thereof, a recess whereby a tube engaging hook 3, having a substantially rectangular base may be received thereby. It is to be noted, that one end of the hook 3 i cut away, as at 4.. By so arranging the he r, engagement with the end of the boiler uloe 10 will be facilitated and means wi l also be provided. whereby. the portion 1 as bent backwardly from the tube, will be so formed as to constitute a heading or retaining flange, the same being engageable with the flue sheet 12, in order that the tube will be properly maintained in position.

A second recess 5, of a greater length than the recess is formed in the opposite side of the mandrel l and receives the elongated strip (3. To adjustably secure the strip within the recess 5, a set screw 7 is passed therethroi 'h and engaged with the threaded soel' ts T of the mandrel. A second. set screw 8 is tu *ned into engagement with the strip (.3 and bears upon the body of the mandrel. By this arrangement, it is evident that adjustment of the strip 1, inwardly or out wardly. is aiforded, since both screws carried near one end of the strip 6, and in this way the tool will be made to fit snugly in tubes of diiferent sizes. Thus, should the tool be used upon fines of varying diameters, the strip 6 can be readily adjusted so as to permit the portion 40'1" the h'ool;v 3 to prop erly enqage the marginal edge of the tune upon which the heading or flange is to be formed. Since the set-screws are carried adjacent to one end of the strip, it is oh vious that the opposite end of the stri will at all time be within the recessg5. However, the set-screws 7 may be adiusted within the socket T to permit the end of the strip adjacent to which the screws are carried to be moved outwardly for a greater distance, and then the screw 8 is brought into a binding engagement with the mandrel within the recess for constituting a. jamming action, and thus holding the strip against further movement in either direction, As the mandrel is reciprocated within a tube, it is obvious the strip having been adjusted to take up the play within the tube will cause the side of the mandrel from which the tube-engaging; hook 3 extends to be hearing firmly upon the tube. Therefore, as the mandrel is recipreeated the cut away portion 5% of the hook Eli will engage the tube and bend the same accurately as hereinbefore specified.

In Fig. 3, 1 have shown 'a slightly modified form of the tool, wherein, the mandrel 1 is provided'with an integral hook 9, identical withthe hook 3, thus, eliminating the necessity of securing the same in position and further, providing a device which will be exceedingly strong and durable.

In using the improved tool, the inner or elongated end of the mandrel 1 is inserted within a tube while the outer portion thereof, carrying the hook 3 may be gripped within the hand of the user. The tool is now reciprocated and the hook 3 thereof engaged with one end of the tube, consequently causing a portion thereof to be bent backwardly upon itself into engagement with the flue sheet and securely clamping the tube thereto. By continuous pounding, a beading or flange is formed and will present a continuous and smooth surface, thereby lending to the durability of thecompleted construction.

, It will be evident, that with the improved tool, the use of a hammer or other similar implement will be eliminated, inasmuch as the weight of the mandrel is sufficient to en able the delivering of a powerful blow to the end of the flue tube.

I claim:

1. A beading tool for boiler tubes comprising an elongated mandrel, a tube engaging ,hook carried by said mandrel and extending from one side thereof and an ad justably mounted strip supported upon the opposite side of said mandrel for holding the mandrel firmly in a tube as the same is being reciprocated and as said hook engages the end of the tube.

2. A beading tool 'for boiler tubes comprising an elongated mandrel, a tube engaging hook extending from one side of said mandrel, said mandrel having an elongated recess formed in one side thereof, an elongated strip fitting within said recess, and means for moving one end of said strip inwardly and outwardly with respect to said recess, thus causing the strip to project beyond the surface of the mandrel for cars 1,27s,esa

ing the mandrel to fit sungly within a tube for permitting said hook to engage the tube.

3. A beading tool for boiler tubes comprising an elongated mandrel, a tube engaging hook engaging one side of said mandrel, said mandrel having an elongated recess therein, an elongated strip fitting within said recess, said mandrel having a threaded socket communicating with said recess, a retaining screw passing through said strip and into said socket for adjusting said strip, and a jam screw passing through said strip and engaging the mandrel within said recess for holding said strip against possible movement, thus causing the mandrel to fit snugly within tubes of various sizes for causing said hook to engage the end of the tube.

4:. A beading tool for boiler tubes comprising an elongated mandrel, said mandrel having a comparatively deep short recess at one side thereof, a comparatively thick tube engaging hook fitting Within said recess and extending therefrom, said book being thicker at one end than the opposite end, said hook having a cut away portion formed in the thickend thereof in alinement with the side surface of said mandrel, said mandrel having an elongated recess formed in one side thereof opposite to the side to which the first mentioned recess is formed, and an elongated strip positioned within .said last 'mentioned recess, and set screws passingfihrough said strip and engaging said mandrel within said recess for holding said strip in an adjusted set position, said strip being adapted to be moved outwardly beyond the surface of said mandrel, thus; causing the strip to take up the play of different sized tubes in which the mandrel may be positioned, thus causing said. hook to be held in alinement with the tube for engaging and bending the same.

In testimony whereof I affix my signature in presence of two witnesses.

OSCAR G. KROSHAUG.

Witnesses A. H. NoRvoLn, CHAS. E. LEE. 

